Bicycle.



J. WAGNER.

mme.

APPLlCTlON FlLED APR; 26. lai?- Mg m Patented Apr. 30,1918.

3 SHEETS-SHEET l.

J. WAGNER.

BICYCLE.

APPLICATION FILED APR.26. |911 Y lmm Patented Apr. 30,1918.

3 SHEETS-SHEET 2.

, MQW Z. MW, J.;

I. WAGNER.

BICYCLE.

APPLICATION man APR. 26. 19u.

l g n Patented Apr. 30, 1918.

3 SHEETS-SHEET 3.

Aso

iininn strains ran l risica.

y Josnri-i umleiten, or wrnnson; wisconsin.

BICYCLE.

incassi.

`ifpecieation of Letters Patent.

i. rateilteanpl. entiere.

bined with said speed changing devicesuas will permit either higher low'gear tobe put in operation with entire `ease and facility;

These and other like objects areattained bythe novel design,construction and combination of parte*hereafter y described and shown inthe accompanying drawings, forming a material pali-t of this disclosure,and in whichzf n Figure lis a side elevational View of aconventional,form of bicycle made vin accordance withthe invention. y y

Fig.` 2 is an enlarged vertical sectional view taken 'online 2-2 of Fig.1 showing the lower gear in operative engagement.

Fig. 3 is a side elevational and sectional View of the same. y

Fig; i is a perspective View showing the driving sprocket and clutch.

Fig. 5 lis a similar perspectve view showing the clutch engaging gear. I

Fig. 6 is a perspective view showing the gear changing'slide.

Fig. 7 is alvertical sectional View similar to that 0f Fig. 2 butshowing the high or fast gear in engagement.

Fig. 8 is a fragmental front elevational and sectional View takensubstantially on 15, and forks 16 is a compression tube 18.

below the seat 20 as is usual,the wheel 21 being contained between therigid forks 16 and has mounted upon the shaft 23 a pair of sprockets,respectively Q5 and 26.

The peda1s28 are connected by means of therefai'iks with the driyinghield "in `bferings"31' lsiipp'o'rted by the post 15,* front strap SBandforks Saas. y

` A sprocket yheel 37 is rotatably moiiiitd tipon tlifesliaft 30,whichis formed with a fixed collar 38', limitingth'e outer moyementofthe hnb 39 `ony the sprockenwheel, the outer en'dof which i'sjform'edwith` ratchet t th @and "contains an `afiniiilar re`ce`sfs`fll2'` inwhich is clisp'olsedtheyspirally ifiotindpiish fixed iai/i5 `sa in neShaft a0r engags and transmits rotar`y`rm`oti`on to the hub 46infiel-side a pluralitypf ratchet teeth `5() adapted to eiigage with thecorresponding ratciet tejetliftl) in the sprocket`wl`ieel.` w

This spin" gear transmUS` rotai'y motion to the pinion oZwinoinlted uponthe stud lcarrie'd a `frigid `frantic 55, asimilar `frame element beingAup'ii the opposite" side ,of the casing 58 attached asia housing forthe gear train, the""fiiialv member of which "con- Vof the spur gear thehub having on its sists a spul" pinion 60, pinnedwolroftflierwisejsecnred to tl're` shaft 61, soy frfinted in the frames 55and 56 as to slide longitudinally therein.,thi`s sliding moti'oii4 beingli`mited by the' fixed head 631formed"` outer elle ai am aan `61,1 whichalso hajescredtp it' a collar Gil against 'whicli one end' "of the pushsprings 65 abnts,.the` other end of the spring pressing against theframe 55.

`A key 66 passes in the outer end of the shaft 61, which rotates thesprocket wheel 68 and at the same time permits it to vslide on theshaft, there being held in operative position by means of the spring 69secured to the bearing 31 of the shaft 30, in such manner that its freeend presses against the edge of the gear, tending to hold it in close.relation to the frame element 56.

A shifting cam plate 70 is provided with longitudinal slots,respectively 71 and 72. the first of which is adapted'to surround theshaft 61 and the latter the shaft 30, so that the cam plate can be movedlongitudinally and with relation to the mentioned shafts. t

Formed on the cam plate 7 0 are two elevations, respectively 75 and 76,the latter of which is suited to make contact with the `end `of the hub46 of the spur gear 48, so as to move the same longitudinally u on theshaft 30, thereby putting the clutc es into or out of engagement.,

In the same manner, the raised projection 75 makes contact with the hubof the gear 60 and through its connection with the shaft i 6l causes thelatter to move longitudinally.

vpression member, the handle 85 being con- "venient for access by arider seated on the seat 20.

Obviously, rotary motion may be commu- 'nicated from the sprocket 37, tothe sprocket 26, when it is desired, by means of the chain 90', at whichtime the handle lever 85 will be ina forward position by depressing` thecam plate causing the clutches 40 and 50 to engagey as is best shown inFig. 2.

When the lever handle is in its rear- Ward position, the rod 39 andcam-plate 70 are raised, releasing the clutches and moving the gears soas to engage, transmitting motion to the sprocket Wheel 68 and throughthe chain 92 to the driving sprocket 25.

By use of the intermediate' gear 52, it Will kbe observed that thedirection of movement of the driving chain from either of the sprockets37 or 68 is the same.

As it is not desired to'reniove the chain Ywhen changing gears and bothvare operated at the same time, and in order to prevent the inoperativesprocket from rotating, both of the sprocket pinions 25 and 26 are heldto the sleeve 95, upon which are formed the disks 96V carrying thespokes Copies of,r this patent may `bepootanec'l for in the hub ends ofthe sleeve 95 and pressed outwardly by flat springs 102 so as to engagewith the internal ratchet 105 formed in the interior of the respectiveratchet pinion, thus permitting the idle pinion to rotate freely uponthe sleeve and witlr out transmitting motion to the inoperative sprocketwheel.

From the foregoing, it will be seen that a practical device ispresented, whereby a different speed of the bicycle may be attainedwithout changing the speed of rotation of the pedals by merely shiftingthe handle lever 85 in either of its positions.

Having thus described my invention, what l claim as new, and desire tosecure by Letters Patent, is:-

1n a two-speed transmitting device, the combination with a drivingshaft, a sprocket rotatably mounted thereon, a spur gear slidable onsaid shaft and driven thereby,

clutches on the engaging surfaces of said driving sprockets and saidspur gear, a second shaft rotatably mounted contiguous to said drivingshaft, a driving sprocket slidably mounted on said second shaft, apiniiion secured to said shaft, an intermediate gear transmitting rotarymotion between said pinion and said spur gear, a sliding cani plate,means for manually operating said cam plate, and means combined withsaid cam plate for causing said clutches to engage or for shifting saidsecond shaft, whereby either of said driving sprockets may be actuated.

In testimony whereof I have atlixcd my signature.

JOSEPH WTAGNER.

ve cents each, by addressing the Commissioner of Patents, Washington, D.C.

